README
¶
moprogress
The progress bar from the docker/moby project, repackaged as a standalone library.
Have you ever wanted a progress bar for your golang-based CLI tool only to find that
the library either does not work on all platforms or does not have multibar support?
Me too! I've always liked the docker cli progress bar so I went ahead and broke
it out into it's own library.
Note that since I am not the original author of this code I won't accept new features; this code is considered "complete".
Installation
go get github.com/pcj/moprogress@latest
Usage
Create a moprogess.Output instance over an io.Writer:
out := moprogress.NewOut(os.Stdout)
progress := moprogress.NewProgressOutput(out)
Then, send progress updates to the output:
progress.WriteProgress(progress.Progress{
ID: "some.tar.gz",
Action: "downloading",
Total: int64(bytesTotal),
Current: int64(bytesSent),
Units: "bytes",
})
The progress.ID field is used as the key to identify the progress bar to update.
Documentation
¶
Index ¶
- Constants
- func DisplayJSONMessagesStream(in io.Reader, out io.Writer, terminalFd uintptr, isTerminal bool, ...) error
- func DisplayJSONMessagesToStream(in io.Reader, stream stream, auxCallback func(JSONMessage)) error
- func FormatError(err error) []byte
- func FormatStatus(id, format string, a ...interface{}) []byte
- func Message(out Output, id, message string)
- func Messagef(out Output, id, format string, a ...interface{})
- func Update(out Output, id, action string)
- func Updatef(out Output, id, format string, a ...interface{})
- type JSONError
- type JSONMessage
- type JSONProgress
- type Out
- type Output
- type Progress
- type Reader
Constants ¶
const RFC3339NanoFixed = "2006-01-02T15:04:05.000000000Z07:00"
RFC3339NanoFixed is time.RFC3339Nano with nanoseconds padded using zeros to ensure the formatted time isalways the same number of characters.
Variables ¶
This section is empty.
Functions ¶
func DisplayJSONMessagesStream ¶
func DisplayJSONMessagesStream(in io.Reader, out io.Writer, terminalFd uintptr, isTerminal bool, auxCallback func(JSONMessage)) error
DisplayJSONMessagesStream displays a json message stream from `in` to `out`, `isTerminal` describes if `out` is a terminal. If this is the case, it will print `\n` at the end of each line and move the cursor while displaying.
func DisplayJSONMessagesToStream ¶
func DisplayJSONMessagesToStream(in io.Reader, stream stream, auxCallback func(JSONMessage)) error
DisplayJSONMessagesToStream prints json messages to the output stream
func FormatError ¶
FormatError formats the error as a JSON object
func FormatStatus ¶
FormatStatus formats the specified objects according to the specified format (and id).
func Messagef ¶
Messagef is a convenience function to write a printf-formatted progress message to the channel.
Types ¶
type JSONError ¶
type JSONError struct {
Code int `json:"code,omitempty"`
Message string `json:"message,omitempty"`
}
JSONError wraps a concrete Code and Message, `Code` is is an integer error code, `Message` is the error message.
type JSONMessage ¶
type JSONMessage struct {
Stream string `json:"stream,omitempty"`
Status string `json:"status,omitempty"`
Progress *JSONProgress `json:"progressDetail,omitempty"`
ProgressMessage string `json:"progress,omitempty"` // deprecated
ID string `json:"id,omitempty"`
From string `json:"from,omitempty"`
Time int64 `json:"time,omitempty"`
TimeNano int64 `json:"timeNano,omitempty"`
Error *JSONError `json:"errorDetail,omitempty"`
ErrorMessage string `json:"error,omitempty"` // deprecated
// Aux contains out-of-band data, such as digests for push signing and image id after building.
Aux *json.RawMessage `json:"aux,omitempty"`
}
JSONMessage defines a message struct. It describes the created time, where it from, status, ID of the message. It's used for docker events.
type JSONProgress ¶
type JSONProgress struct {
Current int64 `json:"current,omitempty"`
Total int64 `json:"total,omitempty"`
Start int64 `json:"start,omitempty"`
// If true, don't show xB/yB
HideCounts bool `json:"hidecounts,omitempty"`
Units string `json:"units,omitempty"`
// contains filtered or unexported fields
}
JSONProgress describes a Progress. terminalFd is the fd of the current terminal, Start is the initial value for the operation. Current is the current status and value of the progress made towards Total. Total is the end value describing when we made 100% progress for an operation.
func (*JSONProgress) String ¶
func (p *JSONProgress) String() string
type Out ¶
type Out struct {
// contains filtered or unexported fields
}
Out is an output stream used by the DockerCli to write normal program output.
func (*Out) GetTtySize ¶
GetTtySize returns the height and width in characters of the tty
func (*Out) IsTerminal ¶
func (s *Out) IsTerminal() bool
IsTerminal returns true if this stream is connected to a terminal
func (*Out) RestoreTerminal ¶
func (s *Out) RestoreTerminal()
RestoreTerminal restores normal mode to the terminal
func (*Out) SetIsTerminal ¶
func (s *Out) SetIsTerminal(isTerminal bool)
SetIsTerminal sets the boolean used for isTerminal
func (*Out) SetRawTerminal ¶
SetRawTerminal sets raw mode on the input terminal
type Output ¶
func ChanOutput ¶
ChanOutput returns an Output that writes progress updates to the supplied channel.
func NewJSONProgressOutput ¶
NewJSONProgressOutput returns a progress.Output that formats output using JSON objects
func NewProgressOutput ¶
type Progress ¶
type Progress struct {
ID string
// Progress contains a Message or...
Message string
// ...progress of an action
Action string
Current int64
Total int64
// If true, don't show xB/yB
HideCounts bool
// If not empty, use units instead of bytes for counts
Units string
// Aux contains extra information not presented to the user, such as
// digests for push signing.
Aux interface{}
LastUpdate bool
}
Source Files